959 lines
27 KiB
C
959 lines
27 KiB
C
/* crypto/rsa/rsa_ameth.c */
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/*
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* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
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* 2006.
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*/
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/* ====================================================================
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* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/asn1t.h>
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#include <openssl/x509.h>
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#include <openssl/rsa.h>
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#include <openssl/bn.h>
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#ifndef OPENSSL_NO_CMS
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# include <openssl/cms.h>
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#endif
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#include "asn1_locl.h"
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static int rsa_cms_sign(CMS_SignerInfo *si);
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static int rsa_cms_verify(CMS_SignerInfo *si);
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static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
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static int rsa_cms_encrypt(CMS_RecipientInfo *ri);
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static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
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{
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unsigned char *penc = NULL;
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int penclen;
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penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
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if (penclen <= 0)
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return 0;
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if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA),
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V_ASN1_NULL, NULL, penc, penclen))
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return 1;
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OPENSSL_free(penc);
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return 0;
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}
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static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
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{
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const unsigned char *p;
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int pklen;
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RSA *rsa = NULL;
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if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey))
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return 0;
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if (!(rsa = d2i_RSAPublicKey(NULL, &p, pklen))) {
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RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
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return 0;
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}
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EVP_PKEY_assign_RSA(pkey, rsa);
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return 1;
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}
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static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
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{
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if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
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|| BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
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return 0;
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return 1;
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}
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static int old_rsa_priv_decode(EVP_PKEY *pkey,
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const unsigned char **pder, int derlen)
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{
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RSA *rsa;
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if (!(rsa = d2i_RSAPrivateKey(NULL, pder, derlen))) {
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RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
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return 0;
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}
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EVP_PKEY_assign_RSA(pkey, rsa);
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return 1;
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}
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static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
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{
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return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
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}
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static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
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{
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unsigned char *rk = NULL;
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int rklen;
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rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
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if (rklen <= 0) {
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RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0,
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V_ASN1_NULL, NULL, rk, rklen)) {
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RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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return 1;
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}
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static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
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{
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const unsigned char *p;
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int pklen;
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if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
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return 0;
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return old_rsa_priv_decode(pkey, &p, pklen);
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}
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static int int_rsa_size(const EVP_PKEY *pkey)
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{
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return RSA_size(pkey->pkey.rsa);
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}
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static int rsa_bits(const EVP_PKEY *pkey)
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{
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return BN_num_bits(pkey->pkey.rsa->n);
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}
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static void int_rsa_free(EVP_PKEY *pkey)
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{
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RSA_free(pkey->pkey.rsa);
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}
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static void update_buflen(const BIGNUM *b, size_t *pbuflen)
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{
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size_t i;
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if (!b)
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return;
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if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
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*pbuflen = i;
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}
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static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
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{
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char *str;
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const char *s;
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unsigned char *m = NULL;
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int ret = 0, mod_len = 0;
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size_t buf_len = 0;
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update_buflen(x->n, &buf_len);
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update_buflen(x->e, &buf_len);
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if (priv) {
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update_buflen(x->d, &buf_len);
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update_buflen(x->p, &buf_len);
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update_buflen(x->q, &buf_len);
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update_buflen(x->dmp1, &buf_len);
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update_buflen(x->dmq1, &buf_len);
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update_buflen(x->iqmp, &buf_len);
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}
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m = (unsigned char *)OPENSSL_malloc(buf_len + 10);
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if (m == NULL) {
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RSAerr(RSA_F_DO_RSA_PRINT, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (x->n != NULL)
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mod_len = BN_num_bits(x->n);
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if (!BIO_indent(bp, off, 128))
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goto err;
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if (priv && x->d) {
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if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len)
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<= 0)
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goto err;
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str = "modulus:";
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s = "publicExponent:";
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} else {
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if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len)
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<= 0)
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goto err;
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str = "Modulus:";
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s = "Exponent:";
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}
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if (!ASN1_bn_print(bp, str, x->n, m, off))
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goto err;
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if (!ASN1_bn_print(bp, s, x->e, m, off))
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goto err;
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if (priv) {
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if (!ASN1_bn_print(bp, "privateExponent:", x->d, m, off))
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goto err;
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if (!ASN1_bn_print(bp, "prime1:", x->p, m, off))
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goto err;
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if (!ASN1_bn_print(bp, "prime2:", x->q, m, off))
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goto err;
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if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, m, off))
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goto err;
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if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, m, off))
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goto err;
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if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, m, off))
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goto err;
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}
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ret = 1;
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err:
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if (m != NULL)
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OPENSSL_free(m);
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return (ret);
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}
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static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
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ASN1_PCTX *ctx)
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{
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return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
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}
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static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
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ASN1_PCTX *ctx)
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{
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return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
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}
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/* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */
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static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
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{
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const unsigned char *p;
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int plen;
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if (alg == NULL || alg->parameter == NULL)
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return NULL;
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if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
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return NULL;
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if (alg->parameter->type != V_ASN1_SEQUENCE)
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return NULL;
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p = alg->parameter->value.sequence->data;
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plen = alg->parameter->value.sequence->length;
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return d2i_X509_ALGOR(NULL, &p, plen);
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}
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static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
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X509_ALGOR **pmaskHash)
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{
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const unsigned char *p;
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int plen;
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RSA_PSS_PARAMS *pss;
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*pmaskHash = NULL;
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if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
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return NULL;
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p = alg->parameter->value.sequence->data;
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plen = alg->parameter->value.sequence->length;
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pss = d2i_RSA_PSS_PARAMS(NULL, &p, plen);
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if (!pss)
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return NULL;
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*pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
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return pss;
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}
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static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss,
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X509_ALGOR *maskHash, int indent)
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{
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int rv = 0;
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if (!pss) {
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if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0)
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return 0;
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return 1;
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}
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if (BIO_puts(bp, "\n") <= 0)
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goto err;
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if (!BIO_indent(bp, indent, 128))
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goto err;
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if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
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goto err;
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if (pss->hashAlgorithm) {
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if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
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goto err;
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} else if (BIO_puts(bp, "sha1 (default)") <= 0)
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goto err;
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if (BIO_puts(bp, "\n") <= 0)
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goto err;
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if (!BIO_indent(bp, indent, 128))
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goto err;
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if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
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goto err;
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if (pss->maskGenAlgorithm) {
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if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
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goto err;
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if (BIO_puts(bp, " with ") <= 0)
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goto err;
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if (maskHash) {
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if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
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goto err;
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} else if (BIO_puts(bp, "INVALID") <= 0)
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goto err;
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} else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
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goto err;
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BIO_puts(bp, "\n");
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if (!BIO_indent(bp, indent, 128))
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goto err;
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if (BIO_puts(bp, "Salt Length: 0x") <= 0)
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goto err;
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if (pss->saltLength) {
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if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
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goto err;
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} else if (BIO_puts(bp, "14 (default)") <= 0)
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goto err;
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BIO_puts(bp, "\n");
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if (!BIO_indent(bp, indent, 128))
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goto err;
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if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
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goto err;
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if (pss->trailerField) {
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if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
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goto err;
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} else if (BIO_puts(bp, "BC (default)") <= 0)
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goto err;
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BIO_puts(bp, "\n");
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rv = 1;
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err:
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return rv;
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}
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static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
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const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
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{
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if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) {
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int rv;
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RSA_PSS_PARAMS *pss;
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X509_ALGOR *maskHash;
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pss = rsa_pss_decode(sigalg, &maskHash);
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rv = rsa_pss_param_print(bp, pss, maskHash, indent);
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if (pss)
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RSA_PSS_PARAMS_free(pss);
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if (maskHash)
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X509_ALGOR_free(maskHash);
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if (!rv)
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return 0;
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} else if (!sig && BIO_puts(bp, "\n") <= 0)
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return 0;
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if (sig)
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return X509_signature_dump(bp, sig, indent);
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return 1;
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}
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static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
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{
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X509_ALGOR *alg = NULL;
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switch (op) {
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case ASN1_PKEY_CTRL_PKCS7_SIGN:
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if (arg1 == 0)
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PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
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break;
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case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
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if (arg1 == 0)
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PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
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break;
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#ifndef OPENSSL_NO_CMS
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case ASN1_PKEY_CTRL_CMS_SIGN:
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if (arg1 == 0)
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return rsa_cms_sign(arg2);
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else if (arg1 == 1)
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return rsa_cms_verify(arg2);
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break;
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case ASN1_PKEY_CTRL_CMS_ENVELOPE:
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if (arg1 == 0)
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return rsa_cms_encrypt(arg2);
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else if (arg1 == 1)
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return rsa_cms_decrypt(arg2);
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break;
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case ASN1_PKEY_CTRL_CMS_RI_TYPE:
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*(int *)arg2 = CMS_RECIPINFO_TRANS;
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return 1;
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#endif
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case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
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*(int *)arg2 = NID_sha256;
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return 1;
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default:
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return -2;
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}
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if (alg)
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X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
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return 1;
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}
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/* allocate and set algorithm ID from EVP_MD, default SHA1 */
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static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
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{
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if (EVP_MD_type(md) == NID_sha1)
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return 1;
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*palg = X509_ALGOR_new();
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if (!*palg)
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return 0;
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X509_ALGOR_set_md(*palg, md);
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return 1;
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}
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/* Allocate and set MGF1 algorithm ID from EVP_MD */
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static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
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{
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X509_ALGOR *algtmp = NULL;
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ASN1_STRING *stmp = NULL;
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*palg = NULL;
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if (EVP_MD_type(mgf1md) == NID_sha1)
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return 1;
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/* need to embed algorithm ID inside another */
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if (!rsa_md_to_algor(&algtmp, mgf1md))
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goto err;
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if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp))
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goto err;
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*palg = X509_ALGOR_new();
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if (!*palg)
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goto err;
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X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
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stmp = NULL;
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err:
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if (stmp)
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ASN1_STRING_free(stmp);
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if (algtmp)
|
|
X509_ALGOR_free(algtmp);
|
|
if (*palg)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/* convert algorithm ID to EVP_MD, default SHA1 */
|
|
static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
|
|
{
|
|
const EVP_MD *md;
|
|
if (!alg)
|
|
return EVP_sha1();
|
|
md = EVP_get_digestbyobj(alg->algorithm);
|
|
if (md == NULL)
|
|
RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
|
|
return md;
|
|
}
|
|
|
|
/* convert MGF1 algorithm ID to EVP_MD, default SHA1 */
|
|
static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash)
|
|
{
|
|
const EVP_MD *md;
|
|
if (!alg)
|
|
return EVP_sha1();
|
|
/* Check mask and lookup mask hash algorithm */
|
|
if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) {
|
|
RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM);
|
|
return NULL;
|
|
}
|
|
if (!maskHash) {
|
|
RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER);
|
|
return NULL;
|
|
}
|
|
md = EVP_get_digestbyobj(maskHash->algorithm);
|
|
if (md == NULL) {
|
|
RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST);
|
|
return NULL;
|
|
}
|
|
return md;
|
|
}
|
|
|
|
/*
|
|
* Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter,
|
|
* suitable for setting an AlgorithmIdentifier.
|
|
*/
|
|
|
|
static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
|
|
{
|
|
const EVP_MD *sigmd, *mgf1md;
|
|
RSA_PSS_PARAMS *pss = NULL;
|
|
ASN1_STRING *os = NULL;
|
|
EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
|
|
int saltlen, rv = 0;
|
|
if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
|
|
goto err;
|
|
if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
|
|
goto err;
|
|
if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
|
|
goto err;
|
|
if (saltlen == -1)
|
|
saltlen = EVP_MD_size(sigmd);
|
|
else if (saltlen == -2) {
|
|
saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
|
|
if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
|
|
saltlen--;
|
|
}
|
|
pss = RSA_PSS_PARAMS_new();
|
|
if (!pss)
|
|
goto err;
|
|
if (saltlen != 20) {
|
|
pss->saltLength = ASN1_INTEGER_new();
|
|
if (!pss->saltLength)
|
|
goto err;
|
|
if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
|
|
goto err;
|
|
}
|
|
if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
|
|
goto err;
|
|
if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
|
|
goto err;
|
|
/* Finally create string with pss parameter encoding. */
|
|
if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os))
|
|
goto err;
|
|
rv = 1;
|
|
err:
|
|
if (pss)
|
|
RSA_PSS_PARAMS_free(pss);
|
|
if (rv)
|
|
return os;
|
|
if (os)
|
|
ASN1_STRING_free(os);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
|
|
* then the EVP_MD_CTX is setup and initalised. If it is NULL parameters are
|
|
* passed to pkctx instead.
|
|
*/
|
|
|
|
static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
|
|
X509_ALGOR *sigalg, EVP_PKEY *pkey)
|
|
{
|
|
int rv = -1;
|
|
int saltlen;
|
|
const EVP_MD *mgf1md = NULL, *md = NULL;
|
|
RSA_PSS_PARAMS *pss;
|
|
X509_ALGOR *maskHash;
|
|
/* Sanity check: make sure it is PSS */
|
|
if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
|
|
RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
|
|
return -1;
|
|
}
|
|
/* Decode PSS parameters */
|
|
pss = rsa_pss_decode(sigalg, &maskHash);
|
|
|
|
if (pss == NULL) {
|
|
RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
|
|
goto err;
|
|
}
|
|
mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash);
|
|
if (!mgf1md)
|
|
goto err;
|
|
md = rsa_algor_to_md(pss->hashAlgorithm);
|
|
if (!md)
|
|
goto err;
|
|
|
|
if (pss->saltLength) {
|
|
saltlen = ASN1_INTEGER_get(pss->saltLength);
|
|
|
|
/*
|
|
* Could perform more salt length sanity checks but the main RSA
|
|
* routines will trap other invalid values anyway.
|
|
*/
|
|
if (saltlen < 0) {
|
|
RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH);
|
|
goto err;
|
|
}
|
|
} else
|
|
saltlen = 20;
|
|
|
|
/*
|
|
* low-level routines support only trailer field 0xbc (value 1) and
|
|
* PKCS#1 says we should reject any other value anyway.
|
|
*/
|
|
if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
|
|
RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER);
|
|
goto err;
|
|
}
|
|
|
|
/* We have all parameters now set up context */
|
|
|
|
if (pkey) {
|
|
if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
|
|
goto err;
|
|
} else {
|
|
const EVP_MD *checkmd;
|
|
if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
|
|
goto err;
|
|
if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
|
|
RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
|
|
goto err;
|
|
|
|
if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
|
|
goto err;
|
|
|
|
if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
|
|
goto err;
|
|
/* Carry on */
|
|
rv = 1;
|
|
|
|
err:
|
|
RSA_PSS_PARAMS_free(pss);
|
|
if (maskHash)
|
|
X509_ALGOR_free(maskHash);
|
|
return rv;
|
|
}
|
|
|
|
static int rsa_cms_verify(CMS_SignerInfo *si)
|
|
{
|
|
int nid, nid2;
|
|
X509_ALGOR *alg;
|
|
EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
|
|
CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
|
|
nid = OBJ_obj2nid(alg->algorithm);
|
|
if (nid == NID_rsaEncryption)
|
|
return 1;
|
|
if (nid == NID_rsassaPss)
|
|
return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
|
|
/* Workaround for some implementation that use a signature OID */
|
|
if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
|
|
if (nid2 == NID_rsaEncryption)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Customised RSA item verification routine. This is called when a signature
|
|
* is encountered requiring special handling. We currently only handle PSS.
|
|
*/
|
|
|
|
static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
|
|
X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
|
|
EVP_PKEY *pkey)
|
|
{
|
|
/* Sanity check: make sure it is PSS */
|
|
if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
|
|
return -1;
|
|
}
|
|
if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
|
|
/* Carry on */
|
|
return 2;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int rsa_cms_sign(CMS_SignerInfo *si)
|
|
{
|
|
int pad_mode = RSA_PKCS1_PADDING;
|
|
X509_ALGOR *alg;
|
|
EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
|
|
ASN1_STRING *os = NULL;
|
|
CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
|
|
if (pkctx) {
|
|
if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
|
|
return 0;
|
|
}
|
|
if (pad_mode == RSA_PKCS1_PADDING) {
|
|
X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
|
|
return 1;
|
|
}
|
|
/* We don't support it */
|
|
if (pad_mode != RSA_PKCS1_PSS_PADDING)
|
|
return 0;
|
|
os = rsa_ctx_to_pss(pkctx);
|
|
if (!os)
|
|
return 0;
|
|
X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os);
|
|
return 1;
|
|
}
|
|
|
|
static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
|
|
X509_ALGOR *alg1, X509_ALGOR *alg2,
|
|
ASN1_BIT_STRING *sig)
|
|
{
|
|
int pad_mode;
|
|
EVP_PKEY_CTX *pkctx = ctx->pctx;
|
|
if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
|
|
return 0;
|
|
if (pad_mode == RSA_PKCS1_PADDING)
|
|
return 2;
|
|
if (pad_mode == RSA_PKCS1_PSS_PADDING) {
|
|
ASN1_STRING *os1 = NULL;
|
|
os1 = rsa_ctx_to_pss(pkctx);
|
|
if (!os1)
|
|
return 0;
|
|
/* Duplicate parameters if we have to */
|
|
if (alg2) {
|
|
ASN1_STRING *os2 = ASN1_STRING_dup(os1);
|
|
if (!os2) {
|
|
ASN1_STRING_free(os1);
|
|
return 0;
|
|
}
|
|
X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss),
|
|
V_ASN1_SEQUENCE, os2);
|
|
}
|
|
X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss),
|
|
V_ASN1_SEQUENCE, os1);
|
|
return 3;
|
|
}
|
|
return 2;
|
|
}
|
|
|
|
static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg,
|
|
X509_ALGOR **pmaskHash)
|
|
{
|
|
const unsigned char *p;
|
|
int plen;
|
|
RSA_OAEP_PARAMS *pss;
|
|
|
|
*pmaskHash = NULL;
|
|
|
|
if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
|
|
return NULL;
|
|
p = alg->parameter->value.sequence->data;
|
|
plen = alg->parameter->value.sequence->length;
|
|
pss = d2i_RSA_OAEP_PARAMS(NULL, &p, plen);
|
|
|
|
if (!pss)
|
|
return NULL;
|
|
|
|
*pmaskHash = rsa_mgf1_decode(pss->maskGenFunc);
|
|
|
|
return pss;
|
|
}
|
|
|
|
static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
|
|
{
|
|
EVP_PKEY_CTX *pkctx;
|
|
X509_ALGOR *cmsalg;
|
|
int nid;
|
|
int rv = -1;
|
|
unsigned char *label = NULL;
|
|
int labellen = 0;
|
|
const EVP_MD *mgf1md = NULL, *md = NULL;
|
|
RSA_OAEP_PARAMS *oaep;
|
|
X509_ALGOR *maskHash;
|
|
pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
|
|
if (!pkctx)
|
|
return 0;
|
|
if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
|
|
return -1;
|
|
nid = OBJ_obj2nid(cmsalg->algorithm);
|
|
if (nid == NID_rsaEncryption)
|
|
return 1;
|
|
if (nid != NID_rsaesOaep) {
|
|
RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
|
|
return -1;
|
|
}
|
|
/* Decode OAEP parameters */
|
|
oaep = rsa_oaep_decode(cmsalg, &maskHash);
|
|
|
|
if (oaep == NULL) {
|
|
RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
|
|
goto err;
|
|
}
|
|
|
|
mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash);
|
|
if (!mgf1md)
|
|
goto err;
|
|
md = rsa_algor_to_md(oaep->hashFunc);
|
|
if (!md)
|
|
goto err;
|
|
|
|
if (oaep->pSourceFunc) {
|
|
X509_ALGOR *plab = oaep->pSourceFunc;
|
|
if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
|
|
RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
|
|
goto err;
|
|
}
|
|
if (plab->parameter->type != V_ASN1_OCTET_STRING) {
|
|
RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
|
|
goto err;
|
|
}
|
|
|
|
label = plab->parameter->value.octet_string->data;
|
|
/* Stop label being freed when OAEP parameters are freed */
|
|
plab->parameter->value.octet_string->data = NULL;
|
|
labellen = plab->parameter->value.octet_string->length;
|
|
}
|
|
|
|
if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
|
|
goto err;
|
|
if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
|
|
goto err;
|
|
if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
|
|
goto err;
|
|
if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
|
|
goto err;
|
|
/* Carry on */
|
|
rv = 1;
|
|
|
|
err:
|
|
RSA_OAEP_PARAMS_free(oaep);
|
|
if (maskHash)
|
|
X509_ALGOR_free(maskHash);
|
|
return rv;
|
|
}
|
|
|
|
static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
|
|
{
|
|
const EVP_MD *md, *mgf1md;
|
|
RSA_OAEP_PARAMS *oaep = NULL;
|
|
ASN1_STRING *os = NULL;
|
|
X509_ALGOR *alg;
|
|
EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
|
|
int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
|
|
unsigned char *label;
|
|
CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
|
|
if (pkctx) {
|
|
if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
|
|
return 0;
|
|
}
|
|
if (pad_mode == RSA_PKCS1_PADDING) {
|
|
X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
|
|
return 1;
|
|
}
|
|
/* Not supported */
|
|
if (pad_mode != RSA_PKCS1_OAEP_PADDING)
|
|
return 0;
|
|
if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
|
|
goto err;
|
|
if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
|
|
goto err;
|
|
labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
|
|
if (labellen < 0)
|
|
goto err;
|
|
oaep = RSA_OAEP_PARAMS_new();
|
|
if (!oaep)
|
|
goto err;
|
|
if (!rsa_md_to_algor(&oaep->hashFunc, md))
|
|
goto err;
|
|
if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
|
|
goto err;
|
|
if (labellen > 0) {
|
|
ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new();
|
|
oaep->pSourceFunc = X509_ALGOR_new();
|
|
if (!oaep->pSourceFunc)
|
|
goto err;
|
|
if (!los)
|
|
goto err;
|
|
if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
|
|
ASN1_OCTET_STRING_free(los);
|
|
goto err;
|
|
}
|
|
X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
|
|
V_ASN1_OCTET_STRING, los);
|
|
}
|
|
/* create string with pss parameter encoding. */
|
|
if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
|
|
goto err;
|
|
X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
|
|
os = NULL;
|
|
rv = 1;
|
|
err:
|
|
if (oaep)
|
|
RSA_OAEP_PARAMS_free(oaep);
|
|
if (os)
|
|
ASN1_STRING_free(os);
|
|
return rv;
|
|
}
|
|
|
|
const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = {
|
|
{
|
|
EVP_PKEY_RSA,
|
|
EVP_PKEY_RSA,
|
|
ASN1_PKEY_SIGPARAM_NULL,
|
|
|
|
"RSA",
|
|
"OpenSSL RSA method",
|
|
|
|
rsa_pub_decode,
|
|
rsa_pub_encode,
|
|
rsa_pub_cmp,
|
|
rsa_pub_print,
|
|
|
|
rsa_priv_decode,
|
|
rsa_priv_encode,
|
|
rsa_priv_print,
|
|
|
|
int_rsa_size,
|
|
rsa_bits,
|
|
|
|
0, 0, 0, 0, 0, 0,
|
|
|
|
rsa_sig_print,
|
|
int_rsa_free,
|
|
rsa_pkey_ctrl,
|
|
old_rsa_priv_decode,
|
|
old_rsa_priv_encode,
|
|
rsa_item_verify,
|
|
rsa_item_sign},
|
|
|
|
{
|
|
EVP_PKEY_RSA2,
|
|
EVP_PKEY_RSA,
|
|
ASN1_PKEY_ALIAS}
|
|
};
|